United States Patent 3521623
Inventors:
Nichols, Wayne
Markley, Kenneth G.
Publication Date:
07/28/1970
Assignee:
Wayne, Nichols
Kenneth, Markley G.
Other Classes:
128/DIG.020, 602/19, 128/95.100
International Classes:
A61F5/02; A61F5/02
Foreign References:
| FR1015989A | | | | |
| FR1322197A | | | | |
| GB483111A | | | | |
| CA514278A | | | | |